The purpose of the application is to document and seek retrospective approval for alterations to the scope of repair works following the NP/DDD/0519/0513 and 0514 Planning and Listed Building consents.

[Note: P&M - Structural engineer; HWS - Contractor; Capstone - previous structural engineer; BA - Architect; RW – Rebecca Waddington PDNPA]

VARIATION SCOPE: -

1. **Masonry repairs:** 1.1. **Generally** - additional areas of clause 110 - Type 1 masonry reconstruction, whether full wall depth or single skin and core rebuilding and consolidation. 1.2. **B3 G10 - Cart shed /F8 - Garett** - greater masonry reconstruction required. Refer to P.261C -
   - A) NP/DDD/0519/0513 and 0514 - Type 1 cl B3 Sow 110 illustrated by broad-cross hatch, see P&M 0101, 0111,0403-C03, 0402
   - B) 31.02.20 Contract - rebuilding illustrated by tight crosshatch P.261D & P.283C. P&M have produced a report on the amended scope of works to the Cart Shed & Sty walls
   - C) Contract Variations - additional area reconstructed by HWS annotated on P.261D following 12.05.20 inspection 1.3. **B1 Sty** - increased rebuilding scope to be added to LB application. Ref. BA P.271D, P.274.D, P.277C, P.251D, P.253D, P.256D. 1.4. **B2 cross wall D15** - Type 2 & Type 3 Cintec anchors omitted. Greater proportion of wall reconstructed with quoins to DF.2 in lieu of timber lacings. Refer to BA P.276B. 1.5. **B2 South internal wall** - circa 6m² Inter leaf reconstructed with new through-stones. Remaining portion of wall consolidated with 2no Type 1 Cintec anchors and 4no Type 3 Cintec anchors. Refer to BA P.289A. 1.6. **Ashlar repairs**: additional clause 118 - Type 8/10 masonry indent repairs and new ashlar units. 1.7. **Mortar mix**: - HWS requested alternative external pointing mix using www.mikewye.co.uk non-haired premixed mortar, batched with 5% CalBux 90 [S2]; this was because there was microcracking to S1 hot-mixed lime sample. [RW-PDNPA had no objection to lime-putty premix having viewed new samples S1 and S2 on B3 north elevation].
2. **Structural Stabilisation:**

2.1. **Consolidation Anchors** - variations in the distribution and type of structural ties and grouted reinforcement including tie-rods / Cintec Anchors / Helifix Rods and stainless-steel bed-joint reinforcement.

2.2. **Building 3 - NE Retained Tie-rod/Strap.** Specification: dismantle and reconstruct the upper section of the [concrete] buttress to facilitate the workshop preparation / redecoration and reassembly of tie-rod. External tie rod/strap no longer structurally functional on reconstruction and can be removed. [RW-PDNPA authorized 20.05.20].

3. **Below Ground drainage:**

3.1. Alterations to below ground drainage routing to avoid soakaway excavation to Building 2 / Sty and archaeological disturbance to Building 3.

3.2. Alterations to R12 below ground drainage. Omission of soakaway / CCTV survey. Relocation of Rwp.5 and Rwp.9 [10.07.20 RW approved and confirmed no further action required]. Ref P.203E & P.220D.

4. **Structural Variations - P&M inspections / Timber Survey / Opening-up:**

4.1. Includes renewal of decayed bressummers (in lieu of repair) to cart shed DG.11 & DG.12.

4.2. Stainless-steel and galvanized steel ties/fixings can be left fair faced, but with a dull finish.

5. **Roof:**

5.1. Scope of F8 roof structure repairs including Dragon Beams / Dragon ties / Wall plate. Ref drawings E-102A & P-302B.

5.2. Renewal of the F8 Wallplate with simplified face half-scarfs in lieu of multiple and fragmented bladed scarfs. [RW-PDNPA 10.07.20 & 14.07.20].

5.3. Partially decayed F8 Wallplate with multiple bladed scarfs to be mounted and displayed in F8 Garret at dado height. [RW-PDNPA - approved in principle 10.07.20]

6. **Purlins:**

6.1. B1_Cl.215 purlins tied to masonry with ss restraint straps i.e. Vista DS202. Reason gable has outward lean. [RW-PDNPA approved 11.06.20 - preference to mount straps on upper concealed surface of purlins]. 7. **Grout:**

7.1. **Grout Variations** - Omission of Pozament St Pauls grout installed by pump injection. Addition of fine quartz - NHL 3.5 grout installed by cavity pouring.

8. **Timber lintel:**

DF3 omit replacement of decayed inner timber lintel? Door blocked from installation of drift construction. Use stone slate bedding course as infill for wall plate above. [RW-PDNPA 20.05.20 no objection to the above as detail – as stone slate bedding course concealed by reinstated internal wall plaster].

9. **Doors:**

Barn 3 - Barn 3 - DG.8 and DG.10; Barn 2: DG.3, DG.4, DG.5 reordered to open internally

9.1. **DG.8** - Client requested reordering door to allow internal opening. There appear to be three phases relating to the door geometry. Original early C19th/Mid-C19th/modern. DG.8 has internal historic iron pintol/pintol holes related to the 1st/2nd phases. It is possible to reorder the door to inward opening once the masonry is made good. [RW-PDNPA had no objection to reinstating internal opening door from photo evidence submitted and the site inspection. Existing external pintol holes can be carefully mortar filled and the ironwork stored and labelled].

9.2. **DG.10** - Client request to reorder to allow internal opening. Hanging jamb - rebated quoins appear crude modern detail no rebates for door ledges. 4no off-set hasp pintols survive to the RH quoins. A timber latch-keep post exists to the LH jamb quoins. The interior of the cowhouse has been cement rendered. Client wishes to reuse site reclaimed pintols mounted on the eastern reveal and existing iron keeps mounted on the western reveal. Existing post used to stop leading edge of door repaired and retained. [RW-PDNPA has no objection to reinstating internal opening door from photo evidence submitted and the site inspection including evidence from cowhouse G5 - DG.6. Existing external pintol holes can be carefully mortar filled and the ironwork stored and labelled].

9.3. **DG.3** - renew 2no decayed timber posts in L10.216 Accoya ss bolted to reveals. Existing ashlar lintel shouldered to accommodate timber posts. Provide 2no ss keeps and 4no ss pintols. DG.3 to open inwards.

9.4. **DG.4** - 2no latch keeps & 3no pintols survive on interior reveals. Remove modern frame and hang new stable door on historic pintols to open inwards.

9.5. **DG.5** - hang new stable-door on new ss pintols to open inwards with new ss latch keeps. 10. **Windows**

10.1. **Barn 3 - 1940’s/1950’s inserted windows WG.13 and WG.14** - renewed ashlar in lieu of insitu concrete repairs. Client preference for new gritstone cills. 10.07.20 & 14.07.20. [RW-PDNPA preferred shuttered concrete to match original; but if LBA submitted renewal in gritstone "unlikely to be refused"].

11. **Floorboards**

11.1. Specified K20.110A and Z10 51A as Douglas fir

11.2. **F5 boards** - [www.floydconsult.co.uk](http://www.floydconsult.co.uk) report microscope sample analysis of 2no boards as “slow grown *pinus sylvestris* [Baltic Redwood]. Based on the slow growth rate and general quality, almost certainly imported”.

11.3. **F8 boards** - wormed and decayed elm. Renew in *pinus sylvestris* [Baltic Redwood] as item 11.2 above.

End.